Gas range



I Dec. 15, 1936. w. D. ANTRIM 2,064,713

I GAS RANGE Filed April 18, 1952 s Sheets-Sheet 1 dMW/w WW Dec. 15, 1936. w. D. ANTRIM 2,064,713

(ms RANGE Filed April 18, 1932 3 Sheets-Sheet 3 vii,

6 ha Mr-"VS Patented Dec. 15, 1936 GAS RANGE William D. Antrim, Gloucester, N. J., assignor to Roberts & Mander Stove Company, Philadelphia, lla., a corporation of Pennsylvania Application April 18, 1932, Serial No. 606,036

4 Claims.

My invention relates to certain improvements in'gas ranges and particularly to the oven structures of gas ranges. As usually constructed, the burner is located in a chamber under the oven and the heated gases pass around and into the oven, and consequently when a door is opened quickly, a partial vacuum is formed in the oven and in the burner chamber. This tends to draw air through the mixing tube and into the burner, thinning the mixture and in some cases causing a flame to be produced at the intake end of the mixing tube, which is a dangerous condition. Again, if the door is closed quickly, the air is under pressure and this pressure is liable to blow out the flame, particularly when the flame is low, which is another defect.

The object of my invention is to so construct the range at the burner intake opening that a certain amount of fresh air will be admitted to the burner chamber when the oven door is opened, and allow the escape of air from the burner chamber when the door is closed, so as to balance the pressure or vacuum in the burner chamber at the intake and outlet of the burner so as not to affect the flame at the burner, which will remain constant.

In the accompanying drawings:

Fig. 1 is a sectional elevation of suflicient of an oven of a gas range to illustrate my invention, the section being on the line ll, Fig. 2;

Fig. 2 is a sectional elevation on the line 2--2, Fig. 1;

Fig. 3 is an end view of the mixing chamber;

Fig. 4 is a perspective View of the air inlet ring;

Fig. 5 is an elevation of an oven structure of a gas range illustrating a modification of the invention;

Fig. 6 is a perspective view of the inlet casing of the construction shown in Fig. 5; and

Fig. '7 is a view of a further modification of the invention.

Referring to the drawings,l is the casing of the oven structure. 2 are the inner walls of the oven, spaced from the casing as shown clearly in Fig. 1. In the oven 0!. are rack plates 3, bent to form a series of supports 4 for the racks, not shown. 5 is the bottom plate of the oven proper a, and 6 is a plate spaced from the bottom plate 5 as shown, so as to prevent the flame from the burner impinging directly upon the bottom plate 5. l is the bottom section of the oven, spaced from the bottom plate 5 to form a burner chamber b. The bottom section I is supported on angle bars 9, secured to the casing I and to the front frame ll] of the oven, as shown clearly in Figs. 1 and 2. In the frame I0 is the oven opening H, closed by a door [2 of any usual type.

In the chamber b is the burner 83, having a mixing tube l4 open at the front end l5. I6 is the gas pipe leading from any source of supply and preferably located between the casing l and the lining 2 of the oven, as shown in Fig. 1. This pipe has a right angle connection to a burner nozzle 17, which extends a short distance into the mixing tube. In the forward end of the mixing tube is an air opening I8, and the amount of air admitted through this opening can be regulated by the usual damper H).

The outer end of the mixing tube M is supported by arms 20 projecting from a ring 2! flanged as at 22. The flanges of the ring are secured by bolts to the lining 2. The ring is of greater diameter than the end of the mixing tube, so that there is a fresh air space surrounding the tube, which will allow air to either pats into the. burner chamber or allow the egress of {air from the chamber.

in the ca/sing I, preferably directly in front of the kjrner tube I4, is an opening 23, which is closed by a cap 24 in the present instance, having openings therein for the passage of air. The cap in the present instance is held to the casing I by a'spring clip 25 secured to the center of the cap. The ends of the spring clip engage the inturned flanges 26 on the casing l. A partition ring 21 is located between the casing I and the inner lining 2 of the range, and encloses space between the opening 23 in the casing and the end of the mixing tube. In some instances, however, this partition ring may be dispensed with. The ring is cut to allow for the passage of the gas tube It, as shown clearly in Fig. 1. 0n removing the cap 24 the damper l9 can be readily adjusted so as to regulate the amount of air passing into the mixing tube.

In'Figs. 5 and 6 I have illustrated a modification of the invention, in which in place of the ring 2! there is a casing 2la, which extends into the space between the lining 2 and the casing l of the oven. The flange 22a is formed on the inner edge of this casing and is secured to the lining Z by bolts as shown. Projecting from the casing Zia are arms 20a, which support the outer end of the mixing tube Id. The gas pipe It extends through the casing 2 I a. and its nozzle projects into the inlet end of the mixing tube It. The closing cap 24 for the opening 23 is similar to that described above. In this instance the end of the mixing tube 'does not extend into the casing and there is sufficient space between the end of the tube and the casing to allow for the free flow of air to or from the burner chamber.

By the above construction it will be seen that when the door of the oven is opened quickly, instead of forming a partial vacuum in the burner chamber as heretofore, air will be admitted from the outside through the space between the ring and the outer end of the mixing tube M, which will break any partial vacuum liable to be formed upon the opening of the door, and consequently the flame of the burner will not be affected, and furthermore, if the door is closed rapidly the air will not be under pressure as it is free to escape from the burner chamber through the space between the tube M and the ring, and consequently the flame will not be affected and will not be extinguished when turned low.

In Fig. 7 I have illustrated a modification of the invention, in which the mixing chamber M of the burner extends into the casing Zlb and is supported by arms 2% within the casing. The gas pipe [6a, in place of being located within the oven structure, is located on the outside of the oven structure, and the nozzle Ha extends through the opening 23a in the casing 21a.

I claim:

1. In combination with a gas range; an oven structure comprising an insulated casing having inner and outer spaced walls, an apertured lining spaced from the inner side and bottom walls of said casing and forming therewith an oven chamber in communication with an underlying chamber having a burner therein; a door opening into said oven chamber, means forming a passage providing communication between the burner chamber and the atmosphere comprising an opening in said outer wall in axial alignment with an opening in said inner wall, a ring structure connecting Said openings and having inwardly extending arms, a mixing tube connected to the burner with its outer end supported by said arms in spaced relation to the ring structure to allow air to flow freely between the outer periphcry of the tube and ring structure, a perforated cap on the outer end of said passage, and a gas pipe terminating in a nozzle projecting into the outer end of said mixing tube.

2. The combination in a gas range structure,

of an oven; a burner chamber arranged in communication with said oven; a burner in said chamber; a mixing tube extending into said chamber, and being connected to said burner; means for supplying air to said tube through an opening in a Wall of the structure; and means supporting the inlet end of said tube in predetermined spaced relation to the said wall at the opening therethrough, said means comprising a supporting device attached to said wall at the said opening and having a plurality of inwardly extending radial arms supporting the inlet end of said tube at spaced peripheral points so as to provide an air opening of predetermined size between said burner chamber and the outside atmosphere to prevent the building up of excessive positive or negative pressure in said oven or said chamber.

3. The combination in a gas range structure, of an oven; a burner chamber arranged in communication with said oven; a burner in said chamber; a mixing tube extending into said chamber and being connected to said burner; means for supplying air to said tube through an opening in a wall of the structure; and means supporting the inlet end of said tube in predetermined spaced relation to the said wall; said means comprising a supporting device attached to said wall and having a plurality of inwardly extending radial arms supporting the inlet end of said tube at spaced peripheral points.

4. The combination in a gas range structure, of an oven; a burner chamber arranged in communication with said oven; a burner in said chamber; a mixing tube extending into said chamber and being connected to said burner; means for supplying air to said tube through an opening in a wall of the structure; and means supporting the inlet end of said tube in predetermined spaced relation to the said wall; said means comprising a supporting plate attached to a wall of the structure and having a flange thereon extending toward the burner chamber, said flange being provided with a plurality of inwardly extending portions supporting the inlet end of the tube at spaced peripheral points.

WILLIAM D. ANTRIM. 

